Control knob for an appliance



FIG. 1 is a upper left perspective view of a control knob for an appliance, showing my new design;

FIG. 2 is an enlarged, upper right perspective view of the control knob of the invention;

FIG. 3 is a front elevational view of the control knob of the invention;

FIG. 4 is a top plan view of the control knob of the invention;

FIG. 5 is a right side elevational view of the control knob of the invention, with the left side elevational view being a mirror image thereof; and,

FIG. 6 is a rear elevational view of the control knob of the invention.

The bottom of the control knob does not form part of the invention and is therefore not depicted.

The broken line showing in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a control knob for an appliance, as shown and described. 